#define  _CRT_SECURE_NO_WARNINGS 1

#include <stdio.h>

int main()
{
	int a = 0;
	int b = 0;
	scanf("%d %d",&a,&b);

	a ^= b;
	int i = 0;
	int count = 0;
	for (i = 0; i < 32; i++)
	{
		if ((a >> i & 1) == 1 )
		{
			count++;
		}
	}

	printf("%d\n",count);

	return 0;
}